Target a banker NPC and type "/cmd listsend Soandso 0", but change Soandso to the name of the character to which you'd like the item sent. The zero at the end of the command represents the requested price you are charging the person to whom you are sending the item for the item. Since you are sending the item to yourself and not trying to sell the item, you should charge yourself 0 platinum.
You could also consider creating a character on a second account, and using him 2-boxed to transfer directly, which would also allow the movement of any containers. It's good to have a box if your able to play with him anyway, and if you can't he can still come in handy for various reasons such as this if you prefer not to use the /listsend method.